Originally Posted by CTRLurself [Knyte Custom]
more fans is not always better, it's about smooth continuous airflow.
Air in the bottom/front, out the top/back.
--Flip the fan in the PSU so that is draws air in vertically through it's bottom and then turns it towards the back (make the fan exhaust not intake).
--Make the fans on the back exhaust
--put a fan in the front bottom intake
--Remove the front most top fan (above the PSU) as it will cause negative pressure in the case as there is no good orientation (intake or exhaust) for it
--Orient your Mugen 2 to blow air up out the top (pull is more important than push here)
--If you use 3$ fans this will either sound like a hovercraft or it's not going to move air regardless of the number. Get some decent fans and a fan controller for the ones that won't plug into the mobo (or just go for antec tri-cools)
--In fact, just do Antec Tricools to make tweaking air flow rates easier.
After everything (ONLY fans, PSU, HSF and a cardboard placeholder for your GPU - NOT the mobo, hdds etc.) is in the case, jumper the PSU so the fans all come on without the computer booting, get a smoke machine, fill it with mineral oil (which is non-conductive) and blow smoke on the lowest setting into different intakes and see where it flows to. Make sure there are no swirls in your flow and if there are tweak fans speeds until they go away. These are called stagnation points and they are BAD for cooling systems.
Once you are satisfied that you have laminar flow through the case, boot it and benchmark the hell out of it.
Thanks! That was really helpful, especially the smoke machine part. I already own one (for haloween), so I will definitely try that.
Regarding the cheap $3 fans, I pan on buying some High speed Yate Loons from Jab-Tech, and making a 12v/off/5v toggle switch. I've heard great things about them so I figured I'd give them a shot.
I planned the crazy bottom intake/ top exhaust idea thinking it would make for some pretty smooth airflow. The Only place I think there will be turbulence is where the bottom intakes blow into the GPU. I was thinking hopefully that whatever air didn't run into the GPU would hug the side panel and continue upwards and into the HS.
I think I'm going to make some more cardboard mock-ups so I can try to visualize things a bit better (and use them for the smoke machine test!)
I think you deserve a rep for that post